342 ADDITIONS AND CORRECTIONS. 



Genus PARARHYTIDA Anc. (p. 52). 



Mr. T. D. A. Cofkerell has called my attention to the fact that 

 the name Saissetia (p. 53) is preoccupied in entomology (Coccidce), 

 see Zool. Rec. 1865, and Proc. Amer. Ent. Soc. 1893, p. 54. He 

 proposes to call the m oil u scan group PLATYRHYTIDA, the species- 

 saisseti being its type. 



Genus THYSANOPHORA. 



P. 58, add to synonyms of T. boothiana, H. mauriniana Orb., 

 (" lavalleana " on plate). The reference after T. incrustata should 

 stand : ii, 204. 



Genus POLYGYRA (p. 68). 



Add to list on pp. 76, 77, P. thyroides v. pulchella Ckll., (Journ. 

 of Conch. 1892, p. 39), and 

 P. sanburni W. G. Binn., iii, 145. Kingston, Idaho. 



Genus POLYGRATIA (p. 81). 



Cancel the sectional name Entodina, (p. 83) and the species rey- 

 rei Souv., as a radula received from Prof. Gwatkin proves it to belong 

 to Streptaxidce. The other species are quite different, and may as 

 well be placed in Sysirophia, from which they differ only in the 

 parietal lamina. 



Genus PLEURODONTA, Section Isomeria (p. 93 ). 

 P. meyeri Strubell, Conchyl. Cab., p. 693. 



Genus CA1VLENA (p. 101). 

 C. stolidota Quadr. & Mlldff. Paragua, Philippines. 



The radula of C. cicatricosa is figured on pi. 34, fig. 10, from a 

 mount kindly lent me by Prof. Gwatkin. 



Section Pse,udobba Mlldff. (p. 105). 

 C. brunonis Kobelt, Conch. Cab., p. 681. Halmaheira, 



Genus OBBA (p. 107). 

 Add H. conomphala Pfr. to synonymy of 0. parmnla (p. 109). 



O. viridiflava Mlldff. O. marginata v. nan a Mlldff. 



G. subhorizontalis Mlldff. v. pullescens Mlldff. 



O. flavopicta Mlldff. O. moricandi v. radiata Mlldff. 



O. basidentata v. grandis Mlldff. O. scrobiculata v. conoulalis 



Mlldff. 



